124 LABRADOR 
“The mountains around Nachvak are steep, rough- 
sided, peaked, and serrated, and have no appearance of 
having been glaciated, excepting close to the sea-level. 
The rocks are softened, eroded, and deeply decayed. . . . 
Throughout the drift period, the top of the coast-range of 
the Labrador stood above the ice and was not glaciated, 
especially in the high northern part.” An exploration more ~ 
prolonged than any permitted to either of the two geologists 
mentioned was carried on by the writer in 1900, and his 
observations entirely corroborate their conclusion. 
In the northern Torngat Mountains, all signs of general 
glaciation cease at the level of about 2000 feet above the 
sea. Above that level, the ledges are thoroughly shattered 
into angular fragments by the frost, and weathered to a 
deep brown colour strikingly different from the gray tints 
of the rounded ledges and boulders which have been 
scoured by the ice lower down the slope. The decompo- 
sition of the rock is doubtless something like that which 
affected all the ledges of the Labrador in pre-Glacial 
time. The 2000-foot contour also marks the upper limit 
at which “erratic”? boulders, namely, those which have 
been surely carried from their parent ledges by ice, can 
be found. 
Thus in the Nachvak region the ice-sheet at its maximum 
during the Glacial Period was not more than one-third as 
thick as in southeastern Labrador, and filled these northern 
valleys to a height of about 2000 feet above the present 
level of the sea, but no higher. The ice of the local Nachvak 
Glacier was in largest part derived from the main interior 
ice-cap which flowed through a deep transverse cleft in 
the Torngat Range. Branch glaciers growing in the moun- 
